This blog is part of our Rails 6.1 series.
Rails 6.1 adds support to handle db:rollback in case of multiple database application.
Prior to this change, on executing db:rollback Rails used to rollback the latest migration from the primary database. If we passed on a [:NAME] option along with to specify the database, we used to get an error. Check out the issue for more details.
1> rails db:rollback:secondary 2 3rails aborted! 4Don't know how to build task `db:rollback:secondary` (See the list of available tasks with `rails --tasks`) 5Did you mean? db:rollback
Staring with Rails 6.1, we need to pass the database name along with db:rollback:[NAME] otherwise a RuntimeError is raised.
1> rails db:rollback 2 3rails aborted! 4You're using a multiple database application. To use `db:migrate:rollback` you must run the namespaced task with a VERSION. Available tasks are db:migrate:rollback:primary and db:migrate:rollback:secondary. 5 6> rails db:rollback:primary 7 8== 20200731130500 CreateTeams: reverting ====================================== 9-- drop_table(:teams) 10 -> 0.0060s 11== 20200731130500 CreateTeams: reverted (0.0104s) =============================
Check out the pull request for more details on this.